Car-heating apparatus



I (No M odei.)

J. H. SEWALL. GAR HEATING APPARATUS.

Patented May 7, 1889.

UNITED STATES PATENT OFFICE.

JAMES H. SEVVALL, OE PORTLAND, MAINE.

CAR-HEATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 402,621, dated May '7, 1889.

' Application filed April 5, 1888- Serial No: 269,693, (No modelr) To aZZ whom it may concern.

Be it known that I, JAMES H.- SEWALL, of Portland, in the county of Cumberland and State of Maine, have invented an Improvement in Oar-Heating Apparatus, of which the following description, in connection with the accompanying drawing, is a specification, like letters on the drawing representing like parts.

This invention is an improvement upon that class of car-heating apparatus shown and described in United States Patent No. 142,7 37, granted to E. S. Scripture and William Stackman, and also in- United States Patent No. 373,314, granted to me, wherein a main steam or warming pipe leading from a main heater-as the locomotive, for instanceis employed, extending from 'car to car and communicating with the circulation-pipes in each car, and an auxiliary heater is also employed for each car to be used when the main heater is cut off or the supply limited. I11 Patent No. 37 3,314, referred to, the construction is peculiarly adapted for steam-circulation in the cars, deriving its source from either the main or auxiliary heaters. In some instances it is considered preferable to employ hot water as the'heating medium in the cars, especially in cars in which such pipes are now placed; and the object of this invention is to provide such hot-water circulation pipeswith a main heater and an auxiliary heater.

' In accordance with this invention I prefer to employ steam taken from the locomotiveboiler and conveyed from car to car by a single main pipe as the main heating medium, and to lead from said single pipe at each car a branch pipe for delivering steam into a coil which is placed in a water-reservoir, the water-circulation pipes which are placed in the car communicating with the said reservoir, and as the water is heated by the coil it circulate's freely through said circulation-pipes.

The said water reservoir is placed beneath the car and forms apart of the auxiliary heater, it being placed in contact with a firepot, in which the fire may be kindled at any time desired to heat the water contained in the reservoir. To provide for the loss of heat sustained by the removal from the car of the usual heater or boiler, I have also provided a steam pipe, which, by a suitable valve, communicates with the main steam-pipe beneath the car.

The drawing shows in elevation a system of circulation-pipes contained in a car and a main steam-pipe, and in vertical section the auxiliary boiler.

. The main steampipe a is preferably located beneath the car, as represented in Pat ent No. 373,314, it being adapted to be coupled to the next caror to the locomotive and to receive its supply of steam from the loco motive. A branch pipe, a, leads from the main steam-pipe, which is connected with a coil, a placed in a reservoir, 1), filled with wa ter, the said coil terminating in a trap, 25, of any usual or suitable construction. The

branch pipe a is provided with a valve, a

by which it may be opened and closed when desired to admit or shut off steam from the main steam-pipe. The pipe (1, is made much smaller in diameter than the main steampipe a, so as to take but asmall portion of the steam therefrom; or, if desired, the valve a can be an ordinary reducing-valve and effect the same result. The pipe 0 leads from the reservoir 1), which extends upward to -a tank, 0', and a pipe, 0 extends downward from the tank 0 which is connected with the pipe 0 upon or near the floor of the car, said-pipe a being. bent in any suitable manner and re turning to the lower part of the reservoir 1) by pipe 0. The pipes c, c c and 0 form the hot watei circulation pipes within the car, and the water contained in the reservoir 12 is heated by the steam-coil and circulates freely through the circulation-pipes.

A flre pot, (l, is contained. in the reservoir 7), it being made smaller in diameter, so that the water contained in the reservoir may come in contact with it upon all sides except at the bottom. The outer chamber, 6, surrounds the water reservoir b, which communicates with the fire-pot d by numerous passages, as c, said outer chamber receiving the products of combustion which escape through the flue f. This form of boiler is substantially the same as the auxiliary boiler shown and described in application for Letters Patent, Serial No. 231,565, filed by me March 19, 1887, to which reference may be had.

It will be seen that by the construction shown a single reservoir, as b, is employed, which is heated either by the steam from the main steam-pipe or by the fire in the fire-pot d, and in either instance the water will be heated and circulate freely through the circulation-pipes, and by placing the said waterrcservoir beneath the car and allowing it to serve as the boiler for the auxiliary much space within the car is saved.

To compensate for the loss of heat in the car caused by the removal of the heater or boiler now commonly used, I have supplied a steam-pipe, 1', extending from end to end of the car, one end of said pipe being connected with the branch pipe at at a point beyond the valve a the other end being connected with the coil a near its end, so that when the valve a is opened the steam fills the coil a and also the pipe 27.

A valve, 1', is placed in the circulationpipe '2', and shuts off the steam when desired when said valve is closed, it being understood that the collection of water of condensation at the opposite end of the pipe adjacent to the trap t will prevent the steam from entering at that end.

I do not herein broadly claim the combination, with a car, of a system of circulatingpipes within said car and two heaters, both in operative contact with said circulating system, or with branches thereof, and adapted to be operated simultaneously or separately for impart-ing heat thereto; nor do I broadly claim the combination, with a system of water-circulating pipes within the car, of a suitable radiator in contact with said circulating system or a branch thereof, mechanism for supplying said radiator with steam as a primary means of heating said circulating system, and a secondary heater also in operative contact with said circulating system and adapted to heat the same.

I claim- 1. In a car-heating apparatus, the hot-Watercirculation pipes arranged within the car, a waterreservoir beneath the car and with which said pipes communicate, and means to heat said reservoir to c ause free circulation of the water, combined with steam-circulation pipes arranged within the car, and acoil placed within said reservoir communicating with said steam-circulating pipes, and means for supplying said coil and pipes with steam, substantially as described.

2. In a car-heatin g apparatus, the hot-watercirculation pipes within the car, the main steam-pipe and water-reservoir, and the auxiliary heater surrounding said reservoir, combined with the steam-circulation pipe 7', also branch pipe a, valve a therein, the independent steam and hot water circulation pipes within the car, said steam-circulating pipes being connected with the branch pipe a and the water-reservoir b beneath the car, and with which the water-circulation pipes directly communicate, the heating coil a within said reservoir and connected to the main and steam-circulation pipes, and the auxiliary heater e, surrounding said reservoir, whereby the car may be heated by the circulation therethrough of both steam and water, or by water alone, the water in the water-circulating pipes being heated by steam passed through the coil a from the main steam-pipe, or by the surrounding auxiliary heater 6, or by both, substantially as described.

4. In a car-heating system, the main steampipe, coil a and boiler I), placed in contact with a fire-pot, combined with the hot-watercirculation pipes communicating with the boiler, and the steam-circulation pipes located within the car communicating with the coil, substantially as described.

5. The combination, with a car having a system of water-circulating pipes within said car and two heaters, both in operative contact with said circulating system, or with branches thereof, and adapted to be operated simultaneously or separately for imparting heat thereto, of an independent system of steamcirculating pipes in said car, the said system including therein as a part of its continuous circuit one of the said heaters, substantially as described. I

6. In a car-heating system, the combine tion, with a system of water-circulating pipes within the car and a suitable radiator in 0011- tact with said circulating system or a branch thereof, mechanism for supplying said radiator with steam as a primary means of heating said circulating system, and a secondary heater also in operative contact with said circulating system and adapted to heat the same, of an independent system of steam-circulating pipes within said car, the said system including within it as a part of its contlnuous circuit the steam-supply mechanism f 1 the said radiator, substantially as delbed.

'7. In a car-heating system, the combination, with a system of water-circulating pipes within the car, a main steam-pipe attached to the car and means for connecting it with a suitable generator, a steam-radiator in operative contact with said circulating system or a branch thereof, and a branch pipe connecting said main steam-pipe with said radiator and adapted to supply the same with steam, of an independent system of steamcirculation pipes within said car deriving its supply from said main steam-pipe, the said steam-radiator being included in said independent system as a part of its continuous circuit, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing: Witnesses.

' JAMES H. SEWALL. Witnesses:

BERNICE J. NOYES, J. O. SEARS. 

